src/selectionmanager.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "selectionmanager.h"
  21
  22 #include "dolphinmodel.h"
  23 #include "selectiontoggle.h"
  24 #include <kdirmodel.h>
  25 #include <kiconeffect.h>
  26
  27 #include <QAbstractButton>
  28 #include <QAbstractItemView>
  29 #include <QAbstractProxyModel>
  30 #include <QModelIndex>
  31 #include <QPainter>
  32 #include <QPaintEvent>
  33 #include <QRect>
  34 #include <QTimeLine>
  35
  36 SelectionManager::SelectionManager(QAbstractItemView* parent) :
  37     QObject(parent),
  38     m_view(parent),
  39     m_toggle(0)
  40 {
  41     connect(parent, SIGNAL(entered(const QModelIndex&)),
  42             this, SLOT(slotEntered(const QModelIndex&)));
  43     connect(parent, SIGNAL(viewportEntered()),
  44             this, SLOT(slotViewportEntered()));
  45     m_toggle = new SelectionToggle(m_view->viewport());
  46     m_toggle->setCheckable(true);
  47     m_toggle->hide();
  48     connect(m_toggle, SIGNAL(clicked(bool)),
  49             this, SLOT(setItemSelected(bool)));
  50 }
  51
  52 SelectionManager::~SelectionManager()
  53 {
  54 }
  55
  56 void SelectionManager::reset()
  57 {
  58     m_toggle->reset();
  59 }
  60
  61 void SelectionManager::slotEntered(const QModelIndex& index)
  62 {
  63     m_toggle->hide();
  64     if (index.isValid() && (index.column() == DolphinModel::Name)) {
  65         m_toggle->setUrl(urlForIndex(index));
  66
  67         connect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  68                 this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  69         connect(m_view->selectionModel(),
  70                 SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
  71                 this,
  72                 SLOT(slotSelectionChanged(const QItemSelection&, const QItemSelection&)));
  73
  74         const QRect rect = m_view->visualRect(index);
  75
  76         const int gap = 2;
  77         const int x = rect.left() + gap;
  78         const int y = rect.top() + gap;
  79         m_toggle->move(QPoint(x, y));
  80
  81         QItemSelectionModel* selModel = m_view->selectionModel();
  82         m_toggle->setChecked(selModel->isSelected(index));
  83         m_toggle->show();
  84     } else {
  85         m_toggle->setUrl(KUrl());
  86         disconnect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  87                    this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  88         disconnect(m_view->selectionModel(),
  89                    SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
  90                    this,
  91                    SLOT(slotSelectionChanged(const QItemSelection&, const QItemSelection&)));
  92     }
  93 }
  94
  95 void SelectionManager::slotViewportEntered()
  96 {
  97     m_toggle->hide();
  98 }
  99
 100 void SelectionManager::setItemSelected(bool selected)
 101 {
 102     emit selectionChanged();
 103
 104     const QModelIndex index = indexForUrl(m_toggle->url());
 105     if (index.isValid()) {
 106         QItemSelectionModel* selModel = m_view->selectionModel();
 107         if (selected) {
 108             selModel->select(index, QItemSelectionModel::Select);
 109         } else {
 110             selModel->select(index, QItemSelectionModel::Deselect);
 111         }
 112     }
 113 }
 114
 115 void SelectionManager::slotRowsRemoved(const QModelIndex& parent, int start, int end)
 116 {
 117     Q_UNUSED(parent);
 118     Q_UNUSED(start);
 119     Q_UNUSED(end);
 120     m_toggle->hide();
 121 }
 122
 123 void SelectionManager::slotSelectionChanged(const QItemSelection& selected,
 124                                             const QItemSelection& deselected)
 125 {
 126     // The selection has been changed outside the scope of the selection manager
 127     // (e. g. by the rubberband or the "Select All" action). Take care updating
 128     // the state of the toggle button.
 129     const QModelIndex index = indexForUrl(m_toggle->url());
 130     if (index.isValid()) {
 131         if (selected.contains(index)) {
 132             m_toggle->setChecked(true);
 133         }
 134
 135         if (deselected.contains(index)) {
 136             m_toggle->setChecked(false);
 137         }
 138     }
 139 }
 140
 141 KUrl SelectionManager::urlForIndex(const QModelIndex& index) const
 142 {
 143     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 144     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 145     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 146     return dirModel->itemForIndex(dirIndex).url();
 147 }
 148
 149 const QModelIndex SelectionManager::indexForUrl(const KUrl& url) const
 150 {
 151     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 152     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 153     const QModelIndex dirIndex = dirModel->indexForUrl(url);
 154     return proxyModel->mapFromSource(dirIndex);
 155 }
 156
 157 #include "selectionmanager.moc"